<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <style>
        a {
            text-decoration: none;
            color: black;
            font-size: 18px;
        }

        h3 {
            width: 180px;
            height: 30px;
            margin: 100px auto;
            text-align: center;
            line-height: 30px;
            background-color: aqua;
            border-radius: 5px;
        }
    </style>
</head>
<body>
<h3><a th:href="@{/all}">进入学生管理页面</a></h3>
</body>
</html>